Tire-building apparatus



. 1,529,843 1 MIDGLEY TIRE BUILDING APPARATUS Filed July 26. 1922 INVENTOR ATToRN 'ofiflZZ'wwm may doc/wem; Be @known that THoMAs liInGLnY, a oflie United States of( America, re-

, l ng is a speication.

l inyen'tion relates to improyvernents n1 lo'igne- Qdsof andappai'atus for constructing' l u ,l

lieiot. It the object Rif -theiny'einion vili-is material 'more expedimously ,affini thefpurpos which isv rapid in, :Lotion ilangl ininzvpe-nsflve 1,11 congtruc'tion. 2O;.3 if invention will belegcri'oed ls an `enlarged ietaillieieo part- 1y in median section;

`Fi,`.3i:'s a diagrammatic illusti'aion of n'ensto Ain tlm application of an endless .anC onlie core; Y f :'Fig.' l shows alater stage;

igja 'sliows a still lateivstage; .1 Figblfshows a singe ,intermediate those sliawni' igs; 5 and gand 1 Fgf-'Ylis aCmss-sooonal dtail of the tire showingtlie band Completely applied.

The lirsi;Y operaion in applying'material ire'acnorcling to' this: invention .iS to 1, v l A mfgcore-so that its material tendency io rei'r itSfunStlje'cche-d'form vWill caline the, 'siii' of the stwp' to extendpractically 'Sifnig'lt 'in along the sids ofthe corn.' In 'ezdkin'A of mati'ial include any of the "trie-biiilding..Componont which pass o'ei" tlie'sids and clesvt-Loftli tire," such as the' "'abrio "plies Acoinposininche caiwcass portion, )li tread ubboi", with or without the side ,HSL cushion lubbigfbl'oake strip, 01' ia'fing Strip. In tie'dzaiings I have shown i application meri .nay fas, i922. Seriali nii. www.

ig "Hampden, vinthe county of Hump# and ,Stam of i/assaclmsetts, have' 111-A o-.Builrling Apparatns,k of nf'liioli the' ons'ings, partiularly to the operation of` onfoljrnlng to the sides oa onvex 'goro a' z-.Qf material. which luz-S been apphed..

iThis, bandisilion e idw n- ;a-4 betten manner, than hitherto hast f iilp'ossiilo, anclto provide an apparatus in connecf :on withgthe prefeue'd @mim-)chinenLl 1l1u-s traiga@ in ,the accompanying drawing, infr leased, upon, the coro accom pany in gd raw in;v tins ail manitas ramo-LEY, oFAMnnnn, MASSACHUSETTS, 'naslon'on 'no THE FISE RUBBER EGMPANY, `F GEICQPEE FALLS, EULSSACHUETTS, .n CDELEORATION GFIMASSA- vthev invention as appiaciao the application of *the troai. and; side walls l() to a previously, 'consrutod "carcass l1, shown as mo'unfved teiial is fii'soiorxned in'an ,endless band ofl a cncumforel'lco lfast as small' as 'the' Smallet lein:

unie in 'die built up tire. nandd by radially Inovrs, and taken from thorn of saffier fingern` indiofat'd intii coonapnnying'd1-@infn Y by 1 ingz" flos {togetlioij-to rovi-Vo the ,band fijn/n1 the @xpande' lingers, and an; then poable Q;ipande by opposei 1 band o'lm'ate-,al centrally locatd around the corn Tlieoppose series' of fingers are 'nn separated, causinfr .the band to be re- (igvfl). The caijrier ingersfhafma slight; motion away from the coro so tliaigthey may Cleanits einst, as indicated in dotted lines, Due toflthe tendency These man3 band o revert o its unsticot-c'lied Condition,

the sicles of *une banal will contractfthrough the position'l of Fig. l tozthat of Fig.y 57 when `they ant-end Snbstanially t-'aiglit Clown the sideS of the noyer-These sides nous?J nowbe lpressed against the core, 01' tho pantially f formed ciro "clnfeon, and, incase thecorezis of the usual type having; its' sides nndercig'O must be slu'lpedto conform to'gl-ios undeicut "is-iden in o'ifdoi to pvoasfthe sides .of iho'niaterial aguin's tifo' Core and'confoim itjtlieneto, employ an"appai'atuasuoi; :fisslmnjn inthe f f oaciilwd" biiey, rains Coniiirisefs yieldable inflat-eil b`figsf,"p1'is5cd by' Suitable Anie/angagainst the sido of ilio ("oioyaml pl'oyii'ii Witlifsuiiablo S'nijpoitinn and guiding-means for the bags, whereby the, pressure/Twill causo them'to be dstoiied so A'asno vvpnogressiveiy Conform to the 'contour of the'` core. This lays the maeiialaguinst the coro ina progressive inanne, avoiding (langer of joiming an' pocksuch as a taper pin 19 passing through a taper hole in the telescoping parts of the two pedestal portions. Through the upper portion ofthe pedestal 15 passes a sleeve 20, and inside the sleeve a shaft 21 carrying the core 12. Shaft 21 is held stationar -in the pedestal by a pin 22 attached to a bracket 23 and passing through a slot 24 in the sleeve. B this means the shaft is held stationary blut the sleeve permitted a reciprocative motion.'l Midway of the pedestal is supported a cylinder 25 having a piston 26 t ereon attached to the sleeve 20. Pipes 27 and 28 serve to admit or exhaust compressed air from the two ends of the cylinder. connect either end of the cylinder to a compressed air line 30 in the manner cus-` tomary for double acting air cylinders.

On each end of shaft 21 is securedl a chuck 31 of a type commonly used in sup potting ring cores in tire building, having a plurality of centering pins 32 screwed therein and bearing on the inner periphery of the core. Secured on each end of sleeve 20 is a similar chuck 33, havingv pins 34 supporting a ring? 35 which supports an airl bag 36. As best shown in Fig. 5, the air bag 36 has an inlating tube 37 by which it may lbegi'nitially inflated to the desired degree, arid lies in a concave recess 38 in one face of the ring. This re* cess is shaped generally tov conform to the core, or to the partially built tirev thereon,

- but fits the tire closer at the crest than at the sides, so that as the ring is pressed against `the core (Fig. 6) the tendency will be or-the bag to be distorted towards the inner periphery of the core. Shoulders 39 prevent` undue expansion ofjthe bag in this direction.

Pedestal 16 carries no core, and only oneV ring 35,150 that no sleeve is necessary, and a shaft 40 fixed to pis-ton 26 is substituted therefor. The construction of the ring and bag is the same as in the case of those suppor/Led on Apedestal 15, and the same reference numerals have been used in designating them. y f f f i The operation of theapparatusiand the method employed there\vith',"'will now vbe described. As previously stated, the endless band 10 is stretched trom a circumfer- A valve 29 is operable to y stretched band is then positioned about the core and released upon it, conveniently in the position of the core shown at the lett in Fig. 1. The core with the contracted band thereon is then swung to the position of the core at the right in Fig.v l', andthe pedestal locked in this position by pin 19. Air is admitted to each cylinder 25, pref-V erably simultaneously, so that the rings 35 pressv and guide Ithe. bags 36 into contact with the inwardly extending side portions 'of the band 10. As the bag is pressed against the material, at approximately the median line of the side of the core, it meets with the resistance oli'ered by the core and distorts, flattening throughthe position of Fig. 6 to that of Fig. 2. Due tothe' shape of the recess 38 in the ring-which lits the tire closer at the crest than towards the beadstl1e bag will move towards the beads as it is progressively flattened, thus dragging.the material down the sides of the core and pressing it into place.

This motion is obtained by the stretching of the-bag material laterally as itis flat-v tened by the pressure, and results in snioothL ing the material mto place progressively and in a manner to avoid the formation of air pockets. If the material being applied is in the nature of the fabric or? cord plies 1' of the carcass, it may be'anchpred at the bases of the tire by any suitable bead construction. The addition of these, or other tire elements, ma be accomplished in manners known in ot er forms oi tire building, and need not be described further here'.

Having thus describeduny invention, I claim: I

1. In a tire building apparatusJ a core, opposed ring members recessed to conform to the core, with more clearance adjacent the bead than adjacent the tread, finat'ed bags in the recesses, and means to ress the rings and bagsagainst the core,fvv erehy the bags are distorted towards the bead portions of the core to smooth againstf'the' core tire building material laid thereon.`

2. In a tire building apparatus, a core,4

opposed ring members recessed to conform to the core, with more clearance 'adjacentl the bead than adjacent the tread, infiated bags in the recesses, means to press the,

rings and bags against. the core, whereby the bagsare-distorled iowardsthe bead portions of the core vto smoothl against the core Y tire building material laid thereon, and means to limit the distortion of the bag. i

In a tire building apparatus, acore, a member recessed to .conform tgonesi'de of the core, a permanently inflated bag in the. recess, and means tovinove 'thefmember the core, whereby mth the com fol-ted. no aen'fofmiy d@ v v 4. In n tire budng apparatus, a Loree a member recessed te reeveom sc' ai the vom, the member contfomngto tae @ma 'means to move whereby im@ bag; will be dsorted mi@ l@ a permaneniihf fater bag in thezecass, and

he member against fnhe caire,

THMAS MLGLEY. 

